Improvement in dental pluggers



W; F, jGBISWOLD. Improvement in Dental Pluggers.

l No.125,452.

IEW,

FFICE.

WHITE F. GRISWOLD, OF LEAVENWORTH, KANSAS.

IMPROVEMENT IN DENTAL PLUGGERS.

VSpecification forming part of Letters Patent No. 125,452, dated April9, 1872.

Specification describing a new and useful Improvement in DentistsPluggers, invented by WHITE F. GRISWOLD, of Leavenworth, in the countyof Leavenworth and State of Kansas.

My invention consists of a plugging-instrument in which the slidingmallet, with a spring for impellin g it against the tool-st`ock,inclosed in a tubular stock, is provided with several studs projectingthrough slots in the stock at equal points of distance around it, to beused for forcing the mallet back against the springs, and so that theinstrument may be rotated, as is often required while at work, and yetalways have a stud at command for retracting the mallet. The inventionalso consists of notches in the end of the tube, out of Which thetoolstock projects, and pins in the latter, falling into said notcheswhen the tooLstock isre- Vtractcd by its spring, and serving to hold thetool against turning on its axis while at work also, to hold it forattaching and detaching the tools from the stock to change them, saidtools screwing in and out of said` stock, and thus savin g the necessityof holding said stocks from turning in `Jthe tube-'holder by one handwhile screwing the tools in and out by the other.

Figure l isa side elevation of my improved plugger, and Fig. 2 is asection of the same on the line x x.

Similar letters of reference indicate corresponding parts.

A is the tubular stock, B, the mallet; C, the spring for actuating it 5and I), the studs projecting through the case 'to be used for retracting the mallet. Instead of using only one stud, as heretofore. I proposeto apply as many at suitable distances apart circumierentially, that astud will always be at command when the instrument is revolved, as isoften required,

and at the same time the hammering is going on. E is the tool-stock; F,its retractingspring, and G, the tool, screwing into the outer end ofsaid stock. I propose to have a number of radial notches, H, in the endot' said tubular stock, and to provide, say, one or two radial pins, I,on the tool-stock to drop into the notches, opposite to which it isadjusted when at work to keep Jthe tool from workin g around, as it willwhen there is nothing to' retain it 5 also, to hold the stock fromturning when attaching the tools, which screw out or in, and therebysave the necessity of holding the small tool-stock by one hand fromturning while screwing by the other. It also enables me to hold theinstrument and take out and put in tools by one hand, which is sometimeshighly necessary, in which case the stock is held against the palm ofthehand by the third and fourth fingers and the tool actuated by the thumband first linger. The stein of the mallet may be extended through thecase or not, at will, and the tool G may have a hole through it tointroduce a lever for screwing it in or out.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. A series of studs, D, combined with the mallet B,and extending through the`case to facilitate working the mallet whilerevolving the instrument on its axis, substantially as specified.

2. The arrangement of the notches H in the end of the tool-holding tubeand the pins I in the tool-stock, substantially as specified.

VHITE F. GRISWOLD.

Witnesses:

l). 15. BRENEMAN, Jol-IN E. GOULD.

